1 A wheel and an axle together make a simple machine. 2  Wheels and axles are used to carry loads around easily, for long distances with very less effort. 3  A pulley consists of a wheel with a groove around it. 4  A rope can be passed through the groove.
In sociology and related social sciences, the idea of collective consciousness comes from the French theorist and sociologist Emile Durkheim. Collective consciousness is all about understanding what makes society work.
1 The collective consciousness binds individuals together and creates social integration.  Durkheim saw increasing population density as a key factor in the advent of modernity. As the number of people in a given area increase, so does the number of interactions, and the society becomes more complex.